All client computers on your company network run Windows 7.
A computer is unable to connect to network resources.
The configuration of the computer is as shown in the following table.
You need to ensure that the computer is able to connect to network resources.
What should you do?
A.
Change the IP address to 131.107.3.254.
B.
Change the subnet mask to 255.255.248.0.
C.
Change the default gateway to 131.107.0.1.
D.
Change the preferred DNS server to 131.107.3.1.
Table
IP address 131.107.4.254
Subnet mask 255.255.240.0
Default gateway 131.107.15.255
Preferred DNS server 131.107.3.2
C-Because the default gateway is currently configured incorrectly to be the broadcast address for that subnet.
The network ID is the first IP address in a network, and the broadcast address is the last. The default gateway is what devices on that network are configured to be routed.
CIRD IP Range (ID-Broadcast) Subnet Mask IP Quantity
131.107.0.0/20 131.107.0.0 – 131.107.15.255 255.255.240.0 4096
The network ID is 131.107.0.0
The broadcast is 131.107.15.255
Usable IP addresses for networking is 131.107.0.1-131.107.15.254
Microsoft Note from: http://support.microsoft.com/kb/164015
Incorrect Default Gateway: A computer configured with an incorrect default gateway will be able to communicate with hosts on its own network segment, but will fail to communicate with hosts on some or all remote networks. If a single physical network has more than one router, and the wrong router is configured as a default gateway, a host will be able to communicate with some remote networks, but not others. This problem is common if an organization has a router to an internal TCP/IP network and another router connected to the Internet.
CIRD IP: 131.107.0.0/20
Range(ID-Broadcast): 131.107.0.0 – 131.107.15.255
Subnet Mask: 255.255.240.0
Quantity of Hosts or Nodes: 4096
Classless Inter-Domain Routing (CIDR) is a method for allocating IP addresses and routing Internet Protocol packets.
Ref Wikipedia: http://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing